an odious, sedimentary mist derived from the anus containing fine particles of fecal matter when expelled through the spincter. Tends to be unpredictable and can result in what is known as a 'dookie stain'/'shart'

when you're hungover as shit after a spending a night drunk as a skunk

FECAL DUST: It is not a fahrt. iT Is the dust coming from dried feces.